These mirrors are part of the Femtosecond Optimized optics series, Newport's premier optics product line, reflecting over 99% at 267 or 400 nm. They offer near-zero Group Delay Dispersion (GDD) over small wavelength ranges around 267 or 400 nm. These harmonic mirrors allow for distortion-free manipulation of femtosecond pulses at near normal or 45° AOI.
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10Q20UF.HR20 Ultrafast Mirror, FemtoOptics, 25.4 mm, 3.5° AOI, HR 267 nm | $433 |
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10Q20UF.HR25 Ultrafast Mirror, FemtoOptics, 25.4 mm, 45° AOI, HR 267 nm | $433 |
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10Q20UF.HR40 Ultrafast Mirror, FemtoOptics, 25.4 mm, 0° AOI, HR 400 nm, HT 800 nm | $326 |
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10Q20UF.HR45 Ultrafast Mirror, FemtoOptics, 25.4 mm, 45° AOI, HR 400 nm, HT 800 nm | $326 |
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| Wavelength Range | 257-277 nm | 250-285 nm | 360-440 nm | 350-440 nm | |
| Angle of Incidence | 3.5° | 45° | 0° | 45° | |
| Reflectivity | R>99% @ 257-277 nm | RS>99% @ 250-285 nm, RP>98% @ 259-275 nm | R>99.6% @ 360-440 nm, T>96% @ 500-1000 nm | RS>99.5% @ 350-440 nm, RP>99.5% @ 360-420 nm, TP>96% @ 500-1000 nm | |
| Material | N-BK7 | N-BK7 | N-BK7 | Fused Silica | |
| Surface Quality | 10-5 scratch-dig | 10-5 scratch-dig | 10-5 scratch-dig | 10-5 scratch-dig | |
| Surface Flatness | λ/10 at 632.8 nm | λ/10 at 633 nm | λ/10 at 633 nm | λ/10 at 632.8 nm | |
| Back Surface | Commercial Polished | Commercial Polished | Commercial Polished | Commercial Polished | |
| Thickness | 6.35 mm | 6.35 mm | 6.35 mm | 6.35 mm | |
| Thickness Tolerance | ±0.1 mm | ±0.1 mm | ±0.1 mm | ±0.1 mm | |
| Diameter | 25.4 mm | 25.4 mm | 25.4 mm | 25.4 mm | |
| Diameter Tolerance | +0/-0.1 mm | +0/-0.1 mm | +0/-0.1 mm | +0/-0.1 mm | |
| Wedge | < 5 arcminutes | < 5 arcminutes | <5 arc min | < 5 arc min | |
| Clear Aperture | ≥ central 85% of diameter | > central 85% of diameter | > central 85% of diameter | > central 85% of diameter | |
| Cleaning | Non-abrasive method, methanol or isopropyl alcohol on lens tissue recommended | Non-abrasive method, methanol or isopropyl alcohol on lens tissue recommended | See How to Clean Optics | See How to Clean Optics |
10Q20UF.HR20 provides high reflectance and low GDD in a wavelength range of approximately 20 nm centered at 267 nm, at near normal incidence.
UF.HR25 provides high reflectance and low GDD in a wavelength range of approximately 40 nm centered at 267 nm, for an angle of incidence of 45° and s-polarized light. Blue: P-Polarized Light, Red: S- Polarized Light.
UF.HR40 provides reflectance higher than 99.6% and low GDD in a wavelength range of approximately 80 nm centered at 400 nm. This is the maximum bandwidth achievable in this wavelength range with absorption-free non-dispersive dielectric mirrors and supports minimum pulse durations ranging from 9 fs to 12 fs, depending on the spectral shape.
The UF.HR40 coating is very versatile. Not only is it a high reflector for 400 nm, the mirror doubles as a dichroic filter, transmitting 800 nm.
UF.HR45 provides reflectance higher than 99.5% and low GDD in a wavelength range of approximately 60 nm centered at 400 nm, for an angle of incidence of 45° and p-polarized light. For s-polarized light, the bandwidth increases to 90 nm at 400 nm. This is the maximum bandwidth achievable in this wavelength range with absorption-free non-dispersive dielectric mirrors. Blue: S-Polarized Light, Red: P- Polarized Light.
The UF.HR45 coating is very versatile. Not only is it a high reflector for 400 nm, the mirror doubles as a dichroic filter, transmitting 800 nm.
FemtoOptics™ is the premier optics product line specifically optimized for femtosecond pulse manipulation. Consisting of innovative, high-quality, easy-to-use, cutting-edge optical components and assemblies, we have exceptional support and service for industrial and research applications across the world. See cross-reference information to the right.
| Newport Part | FemtoOptics Part |
| 10Q20UF.HR20 | OA015 |
| 10Q20UF.HR25 | OA013 |
| 10Q20UF.HR40 | OA074 |
| 10Q20UF.HR45 | OA075 |
N-BK7 is a relatively hard Borosilicate glass that offers good scratch resistance with a very low level of inclusions. For more information, refer to the optical material technical note.
Fused Silica is synthetic amorphous silicon dioxide of extremely high purity. This non-crystalline, colorless silica glass combines a low content of inclusions with high refractive index homogeneity, a very low thermal expansion coefficient, and excellent transmittance in the wavelength regime from UV to NIR. As a result, these mirrors will perform better with temperature fluctuations and is ideal for high-energy laser applications due to its high energy damage threshold. For more information, please see our Optical Materials technical note.
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